x1 = x1
x2 = x10
x3 = x11
x4 = x12
x5 = x13
x6 = x14
x7 = x15
x8 = x16
x9 = x17
x10 = x18
x11 = x19
x12 = x2
x13 = x20
x14 = x21
x15 = x22
x16 = x23
x17 = x24
x18 = x25
x19 = x3
x20 = x4
x21 = x5
x22 = x6
x23 = x7
x24 = x8
x25 = x9